How to Check md5 sum of download iso before burning

I need to check the md5 sum of the iso before burning as it through error on cd

With md5sum on CLI.

=> md5sum --help

=> man md5sum

check md5sum linux - Google Search

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Thks for your fast resposne I have followed that link, md5 checks out ok with opensuse number must of burnt wrong Thks again

If you point K3b at any iso it will calculate the MD5 checksum before it does anything else.